1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbdb3505032049644c3dbbe1120645676c2f8041458c1d8b310e346746ca827. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb8b9f9d-9b9e-4a88-b230-f6dcc90663cd.json and https://artists.proofprofile.net/proofs/artist/eb8b9f9d-9b9e-4a88-b230-f6dcc90663cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf400a5a0041977a6065f5bdbbae55ee9d4a34ed6a35bbb45596dc9eb3c1fee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b2282c26c0c85dbdddeb3bb60d9b6bcd3b0d71cedded2e73566f7e4e091b92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd90078dca095af2ca5b145f01c2889fd5a7788cf8ceac437deb4c92a344673. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216fc90778fb45b9567af6889ee95a2dd064425306cc8f1cb164dd1ca8b44875. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a32d64f92d510bef20e5338462bb5b1c812b7f7ba870a7640814e29e55d1413. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8473c6e8e28e466fcaf4ed1510b177efed5223bd4305bd1a98e67c9791bcf4a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d53478f46febce59f6a3fc2bedff8eccb52640c18888358e353755482451eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f6944accf30f8c4d5a44264d9550c474a502d9bc4c0f94909cad935f525f4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477781c0dff771be3d8b8a62bf70d857cc83f60234f3d864d1201e4a6bad4a05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb17cc827f26c8f527aca09f6bfbb78fa4b57cdb155d96b28fe4217b7cc7ef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370947ec32d3ed37be844c1dc61fad67c11264ba0cb814bdb4c11b2662a0f4ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61100084.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6cabb9b1a91f97adcc219271b62a93ac6de388eb9d04170c128d1e9109df56. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61100083.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86bb7ab0569f53588085b32438f4d527af1c9dbdce10b178e22238ec6e150e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e57eb3a183d6b213b5d00a852d0b0fdf110167daf7094b2256f15f11932c060. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB3UD0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8416222d56208619481c02056665c3ef05e05163febb4a263ba9a24edc67d1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB3UD0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e0332fc20d906daee38fef0eb9e799b72c9b7f68c941d1392abd3a5a1337d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB3UD0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfccfee89f3929bd2e931f044906ad221a338129514940c3977c25bd6bd2af0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:10:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB3UD0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a195fc538e3544b36c952da85aa4a0101ecd7f4d195edeb4677767a5f1d3721. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB3UD0900005.